@article{GDZPPN001262203, title = {Semilattice decomposition of n(2)-permutable semigroups.}, journal = {Semigroup forum}, volume = {46}, year = {1993}, pages = {16-20}, zbl = {0766.20020}, url = {http://dml.mathdoc.fr/item/GDZPPN001262203} }
Nagy, A. Semilattice decomposition of n(2)-permutable semigroups.. Semigroup forum, Tome 46 (1993) pp. 16-20. http://gdmltest.u-ga.fr/item/GDZPPN001262203/